The first one is supposed to be through democratic means through which weak but well-meaning governments form alliances with their local communist parties, which gradually assumes power until they are ready to engineer a coup d' etat. See also Czechoslovakia. However, this ploy only works on countries that are poor and in bad condition.

The second option is to maintain constant pressure on capitalist countries until they collapse from economic overstrain. Marxist theory dictates that capitalist economies can never maintain a high-standard of living and keeping an army while dealing with the constant slumps and booms of their economies are supposed to go through. Eventually, they'll collapse when pressured enough, and a revolution will replace the government with a Communist regime. Unfortunately, this is a contradiction, because despite all the ramble Marxism throws about efficiency, capitalism is infinitely more efficient in the distribution of resources, and hence can always outlast an economic war.

What do you know about Reagan? He ended the Cold War, which is far better than letting it run on. And it did not even come close to destroying the United States. That's bullshit and you know it. Canada didn't even do anything to help, but oh well, what do you expect from a socialist state?